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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Aug. 02, 2017
Jun. 30, 2017
May 19, 2017
Mar. 31, 2017
Jul. 01, 2016
Class of Stock [Line Items]          
Dividends declared per common share (in usd per share)   $ 0.075     $ 0.075
March 2017 Accelerated Stock Repurchase Agreement          
Class of Stock [Line Items]          
Stock Repurchase Program, Remaining Authorized Repurchase Amount   $ 800      
Stock Repurchased and Retired During Period, Value       $ 500  
Repurchases of common stock (in shares)   2.2 16.4 14.2  
Average price paid per share (in usd per share)     $ 30.51    
Subsequent Event | Common Stock          
Class of Stock [Line Items]          
Dividends declared per common share (in usd per share) $ 0.075